This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 34 |
| 3 | 2971 |
| 4 | 513559 |
| 5 | 149670844 |
| 6 | 66653198353 |
| 7 | 42429389528215 |
| 8 | 36788942253042556 |
| 9 | 41888564490333642283 |
| 10 | 60862147523250910055785 |
| 11 | 110264570238241604072673394 |
| 12 | 244397290937585028603794094349 |
| 13 | 652229940568729289038518033117685 |
| 14 | 2067551365133160531453420400711013314 |
| 15 | 7694635622932764203876848262780670955447 |